Active production — 330 µF bulk tantalum for low-voltage rails
The TPSD337K004R0045: The 45 mOhm ESR keeps ripple heating manageable in power-supply decoupling and output filtering applications.
D-case 2917 footprint and board-fit
This is a standard surface-mount footprint shared across many tantalum capacitor lines, so existing PCB land patterns for the D-case accept it without layout changes.
ESR and ripple-current handling
The 45 mOhm ESR at 100 kHz is the dominant parameter for decoupling performance: it determines the self-heating under ripple current and the impedance at switching frequencies. For a 4 V rail carrying 1 A ripple at 500 kHz, the power dissipation in the capacitor is I² × ESR ≈ 45 mW, well within the part's thermal budget at 85°C ambient. General-purpose feature class means this part does not carry an extended-reliability or automotive-grade qualification — it is suitable for commercial and industrial equipment where standard tantalum derating rules apply.